Despite climate change, sea ice will continue to make the Northwest Passage too treacherous to be a regular Arctic shipping route for decades, says study.
Sunday's supermoon, combined with an 18.6-year lunar cycle, caused high tides on both sides of the Atlantic this week. There were many flood warnings and alerts in effect in the UK on Tuesday night. In eastern North America, Tropical Storm Joaquin might combine with high tides to cause flooding.
Scientists are studying the increasingly fast rate of summertime ice melt in Greenland. See a new NASA video, plus illustrations of the 2015 melt season.
Worst recorded years for U.S. wildfires are 2005, 2006, 2007, 2011 and 2012. This year has already joined that list, and wildfire season is still going strong.